Pressure applying means for spinning frames



Oct. 27, 1942. v G. wEsT 2,300,188

PRESSURE- APPLYING MEANS FOR SPINNING muss Original Filed Oct. 21, 1938Patented Oct. 27, 1942 PRESSURE APPLYING MEANS FOR SPINNING FRAMESGeorge West,. Whitinsville, Mass, assignor t Whitin Machine Works,Whitinsville, Mass, a corporation of Massachusetts Originalapplication'October 21, 1938,. Serial No.

236,253. Divided and this application-December 23, 1940, Serial No.371,269

1 Claim.

This application is a division of my prior application Serial No.236,253, filed October 21, 1938', and relates to spinning frames such asare commonly used in the production of cotton yarn. In such frames, therovings are passed between successive pairs of drawing and top rolls bywhich they are drafted to the size required to yield the desired weightor number of yarn.

Drafting pressure has been commonly applied to the top rolls bysuspended weights, and the pressure has been distributed in the desiredratio to the front, middle and back top rolls through top roll saddles,to which the weights have been connected by weight levers and stirrupsor straps.

It is the general object of my present invention to provide an improvedconstruction by which spring pressure can be conveniently andeffectively applied to saddles and top rolls in a spinning or drawingframe.

A further object is to provide a unitary device for applying springpressure to saddles and top rolls, so constructed that the springsetting will not be disturbed by removal of the device from itsoperative position.

I also provide improved pressure-applying means which leaves the rollerbeam and creel board substantially unobstructed, so that they may beeasily kept clear of dirt and lint.

My invention further relates to arrangements and combinations of partswhich will be hereinafter described and more particularly pointed out inthe appended claim.

A preferred form of the invention is shown in the drawing, in which Fig.1 is a sectional end elevation of pressureapplying means embodying myimprovements;

Fig. 2 is a detail view illustrating the operation of certainpressure-releasing means;

Fig. 3 is a detail plan view, looking in the direction of the arrow 3 inFig. 1;

Fig. 4 is a sectional side elevation, taken along the line 4-4 in Fig.3;

Fig. 5 is a sectional end view, taken along the line 5-5 in Fig. 4; and

Fig. 6 is a front elevation, partly in section, and looking in thedirection of the arrow 6 in Fi 2.

Referring to the drawing, I have shown parts of a spinning frameincluding a roller beam I0 supporting a plurality of roll stands IIwhich provide bearings for a front drawing roll I2, a middle drawingroll I and a back drawing roll l5. Top rolls 20, 2| and 22 rest on therolls I2, I4 and I5 respectively, and are held for rotation in theposition indicated by usual guide means, not shown.

Top roll saddles are provided for each set of top rolls and th'esecomprise front saddles 25' L stirrups for the top roll saddles.

For the purpose of thus applying pressure to a saddle, I provide aspring mounted on a hook 3i which is slidable in a bracket 32 secured bya bolt 33 to the under side of the roller beam ID. A collar 35 on thehook 3| forms a stop to limit downward movement of the hook.

The spring 30 is centered in cup washers 36, one of which engages theunder side of the bracket 32, while the other is held in adjustedposition on the hook by lock nuts 38. The hook 31 extends upward througha slot 39 in the usual removable creel board 40 and engages the lowerend of a stirrup or strap 4|.

While my improved spring tension unit may be used with any usual toproll saddles and stirrup connections, I have shown the invention as usedwith certain special stirrup connections to which it is Well adapted,and these connections will now be described.

The upper end of the stirrup 4| is forked to provide cars 42 (Fig. 1)which are pivoted to a cam lever 43 by a pin 44 (Fig. 6) secured in theears 42 and extending through openings in the side walls 46 of the lever43.

The pin 44 also extends through slots 50 (Figs. 4 and 5) in the sidewalls 5| and 52 of a block 53. The block 53 is preferably made of sheetmetal with slotted end walls 54 and 55 which receive an adjusting screw56 having a head 51. and a collar 58. When the parts are assembled, theslotted end wall 55 extends between the head 51 and the collar 58.

The side walls 5| and 52 (Fig. 5) have outturned lower flanges 59, andthe side wall 52 is pressed to the position shown in Fig. 5 after thescrew 56 has been assembled in the block. The screw 56 is threaded in alug 60 (Fig. 1) on the front saddle 25 and provides means for adjustingthe block 53 forward or rearward on the front saddle 25, to therebyincrease or decrease the proportion of weight carried by the front toproll 20.

The cam lever 43 is shown in normal running position in Fig. 1, with thepressure of the spring 30 applied through the cam surfaces 62 to theout-turned flanges 59 of the block 53, which flanges are supported onthe front saddle 25.

When it is desired to relieve the pressure on the top rolls, the lever43 is swung to the position shown in Fig. 2, thus lowering the pin 44and allowing the collar 35 to engage the bracket 32. This relieves thespring pressure, so that the front top roll 20 or the back top roll 22may be freely removed for cleaning, or the stirrup 4! may be unhookedfrom the hook 3| and the front and back saddles and the stirrup 4| maythen be removed as a unit, thus freeing all of the top rolls.

If desired, the releasing movement of the lever 43 may be continued tothe dotted line position shown in Fig. 2, in which position the clearerboards (not shown) may be replaced above the rolls if the machine is tostand idle.

The spring tension construction herein shown has the advantage that thespring 30, hook 3| and bracket 32 may be assembled and the spring 30 maybe adjusted as to pressure, before these parts are inserted in thespinning frame. Accurate and uniform setting of all of the springs 30 ina spinning frame may thus be conveniently accomplished.

No claim is made herein to the pressure-releas- CTl ing connectionsbetween the top roll Saddles and the stirrup, per se, as theseconnections constitute the subject matter, in part, of my originalapplication, Serial No. 236,253, of which this application is adivision.

Having thus described my invention and the advantages thereof, I do notWish to be limited to the details herein disclosed, otherwise than asset forth in the claim, but what I claim is:

In a drawing frame having a roller beam with a fiat horizontallyextended upper portion, drawing rolls supported on said roller beam, and

saddles and stirrups for said drawing rolls, that V improvement instirrup-tensioning means which comprises a fixed stand associated witheach stirrup and detachably secured to and below said horizontallyextended roller beam portion and disposed entirely below the plane ofsaid horizontal portion, a compression spring seated in and below saidstand and extending downward therefrom, a pull rod extending freelythrough said stand and spring and having its lower end engaged andpressed downwardly by said compression spring and having its upper endextending above said stand and beam and detachably connected to thelower end of the corresponding saddle stirrup, and means to limitdownward movement of said pull rod relative to said stand, each stand,pull rod and spring constituting a complete tension device separatelyremovable as a unit from said drawing frame,

GEORGE WEST.

